Oleg Janson
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View article: Is ruthenium dioxide altermagnet?
Is ruthenium dioxide altermagnet? Open
Ruthenium dioxide was named as one of the first and most promising altermagnetic candidates with $d$-wave symmetry. We summarize key findings for this material and critically discuss prospects of making it altermagnetic.
View article: Ferro-spinetic Altermagnets from Electronic Correlations
Ferro-spinetic Altermagnets from Electronic Correlations Open
Altermagnets are fully compensated collinear antiferromagnets that lack the combined time-reversal and translation symmetry. Here we show that their symmetry allows for a switchable ferro-spinetic polarization - the spin analogue of ferroe…
View article: Chiral magnetic excitations and domain textures of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>g</mml:mi></mml:math>-wave altermagnets
Chiral magnetic excitations and domain textures of -wave altermagnets Open
Altermagnets (AMs) constitute a novel class of spin-compensated materials in which opposite-spin sublattices are connected by a crystal rotation, causing their electronic isoenergy surfaces to be spin split. While cubic and tetragonal crys…
View article: Strongly Entangled Kondo and Kagome Lattices and the Emergent Magnetic Ground State in Heavy-Fermion Kagome Metal <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>YbV</mml:mi></mml:mrow><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>Sn</mml:mi></mml:mrow><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:mrow></mml:math>
Strongly Entangled Kondo and Kagome Lattices and the Emergent Magnetic Ground State in Heavy-Fermion Kagome Metal Open
Applying angle-resolved photoemission spectroscopy and density functional theory calculations, we present compelling spectroscopic evidence demonstrating the intertwining and mutual interaction between the Kondo and kagome sublattices in h…
View article: Spin Hall and Edelstein effects in chiral non-collinear altermagnets
Spin Hall and Edelstein effects in chiral non-collinear altermagnets Open
View article: Dataset accociated with manuscript Quintuplet condensation in the skyrmionic insulator Cu2OSeO3 at ultrahigh magnetic fields
Dataset accociated with manuscript Quintuplet condensation in the skyrmionic insulator Cu2OSeO3 at ultrahigh magnetic fields Open
Dataset of Fig. 2 (b): Magnetic field (T), Faraday rotation angle (deg/0.62mm), Transmission amplitude
View article: Cu2OSeO3 turns trigonal with structural transformation and implications for skyrmions
Cu2OSeO3 turns trigonal with structural transformation and implications for skyrmions Open
View article: Magnetic‐Field Tuning of the Spin Dynamics in the Quasi‐2D Van der Waals Antiferromagnet CuCrP<sub>2</sub>S<sub>6</sub>
Magnetic‐Field Tuning of the Spin Dynamics in the Quasi‐2D Van der Waals Antiferromagnet CuCrP<sub>2</sub>S<sub>6</sub> Open
The use of antiferromagnets in magnetoelectronic devices as counterparts of ferromagnets is a new, rapidly developing trend in spintronics that leverages antiferromagnetic (AFM) magnons for transmitting of spin currents. Van der Waals (vdW…
View article: Topological Weyl altermagnetism in CrSb
Topological Weyl altermagnetism in CrSb Open
Altermagnets constitute a novel, third fundamental class of collinear magnetic ordered materials, alongside with ferro- and antiferromagnets. They share with conventional antiferromagnets the feature of a vanishing net magnetization. At th…
View article: Superconducting phase diagram of finite-layer nickelates Ndn+1NinO2n+2
Superconducting phase diagram of finite-layer nickelates Ndn+1NinO2n+2 Open
Following the successful prediction of the superconducting phase diagram for infinite-layer nickelates, here we calculate the superconducting T c vs. the number of layers n for finite-layer nickelates using the dynamical vertex approximati…
View article: Tunable Dirac nodal line in orthorhombic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi>RuO</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:math>
Tunable Dirac nodal line in orthorhombic Open
The pressure evolution of RuO2 is studied using single-crystal x-ray diffraction in a diamond anvil cell, combined with band-structure calculations. The tetragonal rutile structure transforms into the orthorhombic CaCl2-type structure abov…
View article: Chiral magnetic excitations and domain textures of g-wave altermagnets
Chiral magnetic excitations and domain textures of g-wave altermagnets Open
Altermagnets (AMs) constitute a novel class of spin-compensated materials in which opposite-spin sublattices are connected by a crystal rotation, causing their electronic iso-energy surfaces to be spin-split. While cubic and tetragonal cry…
View article: Influence of pressure on the properties of the multigap type-I superconductor BeAu
Influence of pressure on the properties of the multigap type-I superconductor BeAu Open
We report on studies of the superconducting and normal-state properties of the noncentrosymmetric superconductor BeAu under hydrostatic pressure conditions. The room-temperature equation of state (EOS) reveals the values of the bulk modulu…
View article: Site-selective observation of spin dynamics of a Tomonaga-Luttinger liquid in frustrated Heisenberg chains
Site-selective observation of spin dynamics of a Tomonaga-Luttinger liquid in frustrated Heisenberg chains Open
Low-energy spin dynamics is investigated by $^{35}$ Cl NMR measurements in a frustrated antiferromagnet Ca$_3$ReO$_5$Cl$_2$. The local spin susceptibility measured with the Knight shift behaves as a one-dimensional Heisenberg antiferromagn…
View article: Superconducting phase diagram of finite-layer nickelates Nd$_{n+1}$Ni$_n$O$_{2n+2}$
Superconducting phase diagram of finite-layer nickelates Nd$_{n+1}$Ni$_n$O$_{2n+2}$ Open
Following the successful prediction of the superconducting phase diagram for infinite-layer nickelates, here we calculate the superconducting $T_{\mathrm{c}}$ vs. the number of layers $n$ for finite-layer nickelates using the dynamical ver…
View article: Influence of pressure on properties of multi-gap type-I superconductor BeAu
Influence of pressure on properties of multi-gap type-I superconductor BeAu Open
We report on studies of the superconducting and normal state properties of the noncentrosymmetric superconductor BeAu under hydrostatic pressure conditions. The room-temperature equation of state (EOS) reveals the values of the bulk modulu…
View article: Fermi-liquid behavior of nonaltermagnetic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>RuO</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>
Fermi-liquid behavior of nonaltermagnetic Open
The presence of magnetism in potentially altermagnetic RuO2 has been a subject of intense debate. Using broadband infrared spectroscopy combined with density-functional band-structure calculations, we show that the optical conductivity of …
View article: Tunable Dirac nodal line in orthorhombic RuO$_2$
Tunable Dirac nodal line in orthorhombic RuO$_2$ Open
Pressure evolution of RuO2 is studied using single-crystal x-ray diffraction in a diamond anvil cell, combined with \textit{ab initio} band-structure calculations. The tetragonal rutile structure transforms into the orthorhombic CaCl$_2$-t…
View article: Closing in on possible scenarios for infinite-layer nickelates: Comparison of dynamical mean-field theory with angular-resolved photoemission spectroscopy
Closing in on possible scenarios for infinite-layer nickelates: Comparison of dynamical mean-field theory with angular-resolved photoemission spectroscopy Open
Conflicting theoretical scenarios for infinite-layer nickelate superconductors have been hotly debated, particularly regarding whether only a single Ni-3dx2−y2 band is relevant at low energies besides electron pockets or whether multiorbit…
View article: Spin Hall and Edelstein Effects in Novel Chiral Noncollinear Altermagnets
Spin Hall and Edelstein Effects in Novel Chiral Noncollinear Altermagnets Open
Altermagnets are a newly discovered class of magnetic phases that combine the spin polarization behavior of ferromagnetic band structures with the vanishing net magnetization characteristic of antiferromagnets. Initially proposed for colli…
View article: Fermi Arcs Dominating the Electronic Surface Properties of Trigonal PtBi<sub>2</sub>
Fermi Arcs Dominating the Electronic Surface Properties of Trigonal PtBi<sub>2</sub> Open
Materials combining topologically non‐trivial behavior and superconductivity offer a potential route for quantum computation. However, the set of available materials intrinsically realizing these properties are scarce. Recently, surface su…
View article: Spin Hall and Edelstein Effects in Novel Chiral Noncollinear Altermagnets
Spin Hall and Edelstein Effects in Novel Chiral Noncollinear Altermagnets Open
Altermagnets are a newly discovered class of magnetic phases that combine the spin polarization behavior of ferromagnetic band structures with the vanishing net magnetization characteristic of antiferromagnets. Initially proposed for colli…
View article: Closing in on possible scenarios for infinite-layer nickelates: comparison of dynamical mean-field theory with angular-resolved photoemission spectroscopy
Closing in on possible scenarios for infinite-layer nickelates: comparison of dynamical mean-field theory with angular-resolved photoemission spectroscopy Open
Conflicting theoretical scenarios for infinite-layer nickelate superconductors have been hotly debated, particularly regarding whether {only} a single Ni-3$d_{x^2-y^2}$ band is relevant at low energies besides electron pockets or whether m…
View article: Electronic structure of the surface-superconducting Weyl semimetal <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>PtBi</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>
Electronic structure of the surface-superconducting Weyl semimetal Open
Trigonal PtBi$_2$ is a layered semimetal without inversion symmetry,\nfeaturing 12 Weyl points in the vicinity of the Fermi energy. Its topological\nFermi arcs were recently shown to superconduct at low temperatures where bulk\nsuperconduc…
View article: Fermi-liquid behavior of non-altermagnetic RuO$_2$
Fermi-liquid behavior of non-altermagnetic RuO$_2$ Open
Presence of magnetism in potentially altermagnetic RuO$_2$ has been a subject of intense debate. Using broadband infrared spectroscopy combined with density-functional band-structure calculations, we show that optical conductivity of RuO$_…
View article: Topological Weyl Altermagnetism in CrSb
Topological Weyl Altermagnetism in CrSb Open
Altermagnets constitute a novel, third fundamental class of collinear magnetic ordered materials, alongside with ferro- and antiferromagnets. They share with conventional antiferromagnets the feature of a vanishing net magnetization. At th…
View article: Data-driven estimation of transfer integrals in undoped cuprates
Data-driven estimation of transfer integrals in undoped cuprates Open
Undoped cuprates are an abundant class of magnetic insulators, in which the synergy of rich chemistry and sizable quantum fluctuations leads to a variety of magnetic behaviors. Understanding the magnetism of these materials is impossible w…
View article: Topological Weyl Altermagnetism in CrSb
Topological Weyl Altermagnetism in CrSb Open
Altermagnets constitute a novel, third fundamental class of collinear magnetic ordered materials, alongside with ferro- and antiferromagnets. They share with conventional antiferromagnets the feature of a vanishing net magnetization. At th…
View article: Geometric frustration and Dzyaloshinskii-Moriya interactions in a quantum star lattice hybrid copper sulfate
Geometric frustration and Dzyaloshinskii-Moriya interactions in a quantum star lattice hybrid copper sulfate Open
We study the magnetism of a layered, spin-$\\frac12$ organic-inorganic copper\nsulfate, which is a close realization of the star lattice antiferromagnet, one\nof the playgrounds of geometric frustration and resonating valence bond physics\…
View article: Giant Linear Dichroism Controlled by Magnetic Field in FePS$_3$
Giant Linear Dichroism Controlled by Magnetic Field in FePS$_3$ Open
Magnetic-field control of fundamental optical properties is a crucial challenge in the engineering of multifunctional microdevices. Van der Waals (vdW) magnets retaining a magnetic order even in atomically thin layers, offer a promising pl…